A physicist B situated in his inertial lab frame measures the net force on an electron to be F$.$ A physicist C$\text{'}$s lab is moving with $30$ m$/$s toward physicist B$.$ What force will the physicist C measure on that same electron?

a$)$ same force, F

b$)$ force of same magnitude, but opposite direction, $-$F

c$)$ twice the force, $2$F

d$)$ no force, $0$